Article | REF: D4952 V1

Alternating current meters - General

Author: Pierre FERRAND

Publication date: February 10, 2004

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1. Measurement principles

1.1 Single-phase active energy meter

The active energy in a single-phase electrical circuit is obtained by integrating over time the product of the instantaneous values of the voltage u across the circuit and the current i flowing through it. This corresponds to the application of the formula : 0tu(t)i(t)dt

A single-phase active energy meter therefore comprises a multiplier device plus an integrator device. These devices will differ...

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Measurement principles